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Synergy map R7: #402 (adder words, vectorized exp, Abakus cost gate) - #403
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Records #402, plus the rows #400 and #401 moved. New dots N22-N26: the adders as facade words with no consumer yet, the exp speed-up reaching every exp-based word, AVX2 select mask packing as a second array-backed cost, NEON scalar fcmp/csel in simd_exp_f32, and the transactional Abacus against the non-transactional eager counter. Fruit L20, L21, H12, H13; PR C not planned. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XAqKMPh2Seh2WLccCksAdY
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AdaWorldAPI
marked this pull request as ready for review
October 30, 2026 12:23
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Adds section R7 to
.claude/knowledge/synergy-map-2026-10-29.mdfor #402, and records the rows #400 and #401 moved, since neither had an entry. The change is documentation only.Rows that moved
vserfwent from 2.3 to 0.89–1.06 ns/el on AVX-512.gather_rows_f32, copy-freematmul_f32).+1/-1bytes" is still open.New dots
half_add_mask/full_add_maskare facade words, but no consumer outside the fixtures uses them yet. A carry-save count over many mask words is the obvious candidate.Erfthe gap is now about 4×, down from about 10×, and Tract pays for that in accuracy.selectstill packs its masks lane by lane (42vpextrw/vpinsrw). That is a second array-backed AVX2 cost next tomask_blend.simd_exp_f32has about 47 scalarfcmp/csel, and these predate D-BINARY-ABACUS-POLYFILL-0 PR A: half/full adder mask words; vectorized pow2n_from_int #402.Abacusis. The cost is equal on dense masks, slower and noisier on sparse.Fruit
selectAbacus, blocked on L21PR C (the facet bit-plane helper) is not planned.
The map also records that #402 merged while four test jobs were still running, so their outcome was not seen here.
The facet-stride guard is clean on the diff.
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